public class Main {
    public static void main(String[] args) {

        String s = "a";
        System.out.println(Integer.toHexString(System.identityHashCode(s)));
        s+="b";
        System.out.println(Integer.toHexString(System.identityHashCode(s)));
        String c = "ab";


        System.out.println(s == c);
        System.out.println(c);
        System.out.println(s);
        System.out.println(s);
        System.out.println(s);
        System.out.println("master");
    }
}